EN 61643-21-2001 en Low voltage surge protective devices Part 21 Surge protective devices connected to telecommunications and signalling networks - Performance requirements and tes.pdf

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1、BRITISH STANDARD BS EN 61643-21:2001Low voltage surge protective devices Part 21: Surge protective devices connected to telecommunications and signalling networks Performance requirements and testing methodsICS 29.120.50, 33.040.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LA

2、W+A2:2013National forewordThis British Standard is the UK implementation of EN 61643-21:2001+A2:2013. It is derived from IEC 61643-21:2000, incorporating corrigendum March 2001 and amendment 2:2012. It supersedes BS EN 61643-21:2001+A1:2009, which is withdrawn.The start and finish of text introduced

3、 or altered by amendment is indicated in the text by tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by .Where a common modification to an IEC amendment has been introduced, the tags carry the number of the am

4、endment. For example, the common modifications introduced by CENELEC to IEC amendment 1 are indicated by .The UK participation in its preparation was entrusted by Technical Committee PEL/37, Surge Arresters High Voltage, to Subcommittee PEL/37/1, Surge arresters Low voltage.A list of organizations r

5、epresented on this subcommittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS E

6、N 61643-21:2001+A2:2013This British Standard waspublished under the authorityof the Standards Policy andStrategy Committee andcomes into effect on31 August 2001 The British Standards Institution 2013. Published by BSI Standards Limited 2013Amendments/corrigenda issued since publicationDate Comments

7、31 January 2010 Implementation of IEC amendment 1:2008, withCENELEC modifications31 May 2013 Implementation of IEC amendment 2:2012, with CENELEC endorsement A2:2013. Annex ZA updatedISBN 978 0 580 75726 6EUROPEAN STANDARD EN 61643-21NORME EUROPENNEEUROPISCHE NORMCENELECEuropean Committee for Electr

8、otechnical StandardizationComit Europen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische NormungCentral Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.Ref. No. E

9、N 61643-21:2001 EICS 29.240; 29.240.10English versionLow voltage surge protective devicesPart 21: Surge protective devices connected totelecommunications and signalling networks -Performance requirements and testing methods(IEC 61643-21:2000 + corrigendum 2001)Parafoudres basse-tensionPartie 21: Par

10、afoudres connectsaux rseaux de signaux et detlcommunications -Prescriptions de fonctionnement etmthodes dessais(CEI 61643-21:2000 + corrigendum 2001)berspannungsschutzgerte frNiederspannungTeil 21: berspannungsschutzgerte frden Einsatz in Telekommunikations- undsignalverarbeitenden Netzwerken -Leist

11、ungsanforderungen undPrfverfahren(IEC 61643-21:2000 + Corrigendum 2001)This European Standard was approved by CENELEC on 2000-11-01. CENELEC members are bound tocomply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national s

12、tandard without any alteration.Up-to-date lists and bibliographical references concerning such national standards may be obtained onapplication to the Central Secretariat or to any CENELEC member.This European Standard exists in three official versions (English, French, German). A version in any oth

13、erlanguage made by translation under the responsibility of a CENELEC member into its own language andnotified to the Central Secretariat has the same status as the official versions.CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,Denmark, Finland, Fra

14、nce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,Portugal, Spain, Sweden, Switzerland and United Kingdom.+A2January 2013ForewordThe text of document 37A/101/FDIS, future edition 1 of IEC 61643-21, prepared by SC 37A,Low-voltage surge protective devices, of IEC TC 37, Su

15、rge arresters, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61643-21 on 2000-11-01.The following dates were fixed: latest date by which the EN has to be implementedat national level by publication of an identicalnational standard or by endorsement (dop) 2002-02-01

16、 latest date by which the national standards conflictingwith the EN have to be withdrawn (dow) 2003-11-01_Endorsement noticeThe text of the International Standard IEC 61643-21:2000 + corrigendum March 2001 was approved byCENELEC as a European Standard without any modification._Foreword to amendment

17、1 The text of amendment 1:2008 to the International Standard IEC 61643-21:2000, prepared by SC 37A, Low-voltage surge protective devices, of IEC TC 37, Surge arresters, together with common modifications prepared by the Technical Committee CENELEC TC 37A, Low voltage surge protective devices, was su

18、bmitted to the Unique Acceptance Procedure and was approved by CENELEC as amendment A1 to EN 61643-21:2001 on 2009-03-01. In this document the common modifications to IEC 61643-21:2000/A1:2008 are indicated by . The following dates were fixed: latest date by which the amendment has to be implemented

19、 at national level by publication of an identical national standard or by endorsement (dop) 2010-03-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2012-03-01 Annex ZA, which was added by CENELEC, has been updated to reflect the changes in the

20、 normative references. _ PQBS EN 61643-21:2001+A2:2013 EN 61643-21:2001+A2:2013Page 2Foreword to amendment 2The text of document 37A/236/FDIS, future amendment 2 to edition 1 of IEC 61643-21, prepared by IEC/SC 37A “Low-voltage surge protective devices“ of IEC/TC 37 “Surge arresters“ was submitted t

21、o the IEC-CENELEC parallel vote and approved by CENELEC as EN 61643-21:2001/A2:2013. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-07-25 latest date by which the n

22、ational standards conflicting with the document have to be withdrawn (dow) 2015-08-31 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights.

23、This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC). Endorsement notice The text of the International Standard IEC 61643-21:2000/A2:2012 was approved by CENELEC as a European Standard without

24、any modification. In the Bibliography of EN 61643-21:2001, the following note has to be added for the standard indicated: IEC 60664-1 NOTE Harmonised as EN 60664-1. BS EN 61643-21:2001+A2:2013 EN 61643-21:2001+A2:2013Page 3CONTENTSPageINTRODUCTION 7Clause1 General . 81.1 Scope. 81.2 SPD configuratio

25、ns. 81.3 Use of this standard 102 Normative references133 Definitions 144 Service and test conditions .184.1 Service conditions .184.1.1 Normal service conditions 184.1.2 Abnormal service conditions 184.2 Test temperature and humidity.194.3 SPD testing .194.4 Waveform tolerances.205 Requirements .20

26、5.1 General requirements 205.1.1 Identification and documentation205.1.2 Marking215.2 Electrical requirements 215.2.1 Voltage-limiting requirements.215.2.2 Current-limiting requirements.225.2.3 Transmission requirements 245.3 Mechanical requirements.245.3.1 Terminals and connectors255.3.2 Mechanical

27、 strength (mounting) .265.3.3 Resistance to ingress of solid objects and to harmful ingress of water .265.3.4 Protection against direct contact 265.3.5 Fire resistance.265.4 Environmental requirements 265.4.1 High temperature and humidity endurance .265.4.2 Environmental cycling with impulse surges

28、275.4.3 Environmental cycling with a.c. surges.276 Type test 276.1 General tests.276.1.1 Identification and documentation276.1.2 Marking276.2 Electrical tests.286.2.1 Voltage-limiting tests .286.2.2 Current-limiting tests346.2.3 Transmission tests.38BS EN 61643-21:2001+A2:2013 IEC 61643-21:2001+A2:2

29、012Page 4Clause Page6.3 Mechanical tests406.3.1 Terminals and connectors406.3.2 Mechanical strength (mounting) .426.3.3 Resistance to ingress of solid objects and to harmful ingress of water .426.3.4 Protection against direct contact 426.3.5 Fire resistance.436.4 Environmental tests .446.4.1 High te

30、mperature and humidity endurance .446.4.2 Environmental cycling with impulse surges 446.4.3 Environmental cycling with a.c. surges.456.5 Acceptance tests .45Annex A (informative) Devices with current-limiting components only.60Annex ZA (normative) Normative references to international publications w

31、ith theircorresponding European publications .70Bibliography69Figure 1 SPD configurations 9Figure 2 Test circuits for impulse reset time .4Figure 3 Test circuits for a.c. durability and overstressed fault mode4Figure 4 Test circuits for impulse durability and overstressed fault mode .4Figure 5 Test

32、circuits for rated current, series resistance, response time,current reset time, maximum interrupting voltage and operating duty test4Figure 6 Test circuits for a.c. durability.Figure 7 Test circuits for impulse durability Figure 8 Test circuits for insertion loss .Figure 9 Test circuit for return l

33、oss.Figure 10 Test circuits for longitudinal balance.53Figure 11 Test circuit for bit error ratio test.54Figure 12 Test circuit for near-end crosstalk.55Figure 13 Test circuits for high temperature/humidity endurance andenvironmental cycling5Figure 14 Environmental cycling schedule A with RH Gb3 90

34、%5Figure 15 Environmental cycling B .5Figure 16 Examples of multi-line SPDs with a common protective element Annex D (informative) Measurement accuracy .Annex E (informative) Determination of let-through current (Ip) .6BS EN 61643-21:2001+A2:2013 IEC 61643-21:2001+A2:2012Page 5634 Annex F(informativ

35、e)Basic configurations for measuring Up. 67 Annex G (informative) Speical resistibility in telecommunications system 6867895051525267859PageTable 1 General SPD requirements 11Table 2 Waveform tolerances.20Table 3 Voltage and current waveforms for impulse-limiting voltage.30Table 4 Source voltages an

36、d currents for impulse reset test.31Table 5 Preferred values of currents for a.c. durability test.32Table 6 Test currents for response time .35Table 7 Preferred values of current for operating duty tests .37Table 8 Preferred values of a.c. test currents .37Table 9 Preferred values of impulse current

37、 .38Table 10 Standard parameters for figure 8 .38Table 11 Impedance values for longitudinal balance test39Table 12 Test times for BER test40Table 13 Connectable cross-sectional areas of copper conductors for screw-typeterminals or screwless-type terminals41Table 14 Pulling force (screwless terminals

38、).41Table 15 Preferred values of test-time duration for high temperature andhumidity endurance.44Table 16 Preferred values of temperature and duration for environmental cycling tests 45Figure A.1 Configurations of devices with current-limiting component(s) only .Figure E.1 Determination of different

39、ial mode let-through current 64Figure E.2 Determination of common mode let-through current .65Figure E.3 Determination of differential mode let-through current 65Figure E.4 Determination of differential mode let-through current 65Figure E.5 Determination of common mode max. let-through current .65Fi

40、gure E.6 Determination of common mode max. let-through currentat multi-terminal SPDs 66BS EN 61643-21:2001+A2:2013 IEC 61643-21:2001+A2:2012Page 660Figure F.1 Differential Mode measurement of Figure 1 SPDs.67 UPFigure F.2 ITU-T test setup for SPD Common Mode measurement to C terminal.67UPINTRODUCTIO

41、NThe purpose of this International Standard is to identify the requirements for Surge ProtectiveDevices (SPDs) used in protecting telecommunication and signalling systems, for example,low-voltage data, voice, and alarm circuits. All of these systems may be exposed to theeffects of lightning and powe

42、r line faults, either through direct contact or induction. Theseeffects may subject the system to overvoltages or overcurrents or both, whose levels aresufficiently high to harm the system. SPDs are intended to provide protection againstovervoltages and overcurrents caused by lightning and power lin

43、e faults. This standarddescribes tests and requirements which establish methods for testing SPDs and determiningtheir performance.The SPDs addressed in this International Standard may contain overvoltage protectioncomponents only, or a combination of overvoltage and overcurrent protection components

44、.Protection devices containing overcurrent protection components only are not within thecoverage of this standard. However, devices with only overcurrent protection components arecovered in annex A.An SPD may comprise several overvoltage and overcurrent protection components. All SPDsare tested on a

45、 “black box“ basis, i.e., the number of terminals of the SPD determines thetesting procedure, not the number of components in the SPD. The SPD configurations aredescribed in 1.2. In the case of multiple line SPDs, each line may be tested independently ofthe others, but there may also be a need to te

46、st all lines simultaneously.This standard covers a wide range of testing conditions and requirements; the use of some ofthese is at the discretion of the user. How the requirements of this standard relate to thedifferent types of SPD is described in 1.3. Whilst this is a performance standard and cer

47、taincapabilities are demanded of the SPDs, failure rates and their interpretation are left to theuser. Selection and application principles will be covered in IEC 61643-22 1).If the SPD is known to be a single component device, it has to meet the requirements of therelevant standard as well as those

48、 in this standard.1)Under consideration.BS EN 61643-21:2001+A2:2013 IEC 61643-21:2001+A2:2012Page 7LOW VOLTAGE SURGE PROTECTIVE DEVICES Part 21: Surge protective devices connected totelecommunications and signalling networks Performance requirements and testing methods1 General1.1 ScopeThis Internat

49、ional Standard is applicable to devices for surge protection of telecommunicationsand signalling networks against indirect and direct effects of lightning or other transientovervoltages.The purpose of these SPDs is to protect modern electronic equipment connected totelecommunications and signalling networks with nominal system voltages up to 1 000 V(r.m.s.) a.c. and 1 500 V d.c.1.2 SPD configurationsThe SPD configurations des